Anaplasma marginale infection in young and aged cattle.
D000367:Age Factors; D000712:Anaplasmosis / Q000097:blood / Q000662:veterinary*; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000097:blood*; D003168:Complement Fixation Tests; D004906:Erythrocyte Count; D005260:Female; D006400:Hematocrit; D006452:Hemoglobinometry; D008297:Male